Seemingly acting out of character, the Environmental Protection Agency on Nov. 13 announced it will launch a rulemaking to further cut the emission of nitrogen oxide from diesel-powered heavy-duty trucks.

Hyundai Motor and Kia Motors plan to introduce solar charging on certain vehicles after 2019 to help meet global regulatory targets and improve vehicle efficiency, the South Korea-based automakers have announced.

General Motors has proposed a national mandate that would require that 25% of the vehicles sold by manufacturers in 2030 would be zero-emission vehicles, according to comments submitted as part of President Trump's plan to roll back fuel economy standards.

Tennessee Tech said some of the conclusions of its study of glider kit emissions were not accurate, and that the data does not support its earlier statements that the remanufactured engines used in glider kits performed as well as OEM engines certified under EPA emissions standards.